/Engine/Source/Runtime/CoreUObject/Public/Serialization/ArchiveStackTrace.h
bool GenerateDiffMap ( const [FPackageData](API\Runtime\CoreUObject\Serialization\FArchiveStackTrace\FPackageData) & SourcePackage, int64 TotalHeaderSize, int32 MaxDiffsToFind, [FArchiveDiffMap](API\Runtime\CoreUObject\Serialization\FArchiveDiffMap) & OutDiffMap )